Need pics of battery Connections

[Corey'sgotachev]

Was trying to start the truck. Starter turning over slow and I noticed smoke coming from under the hood. I have read about the need to ground the front fender on a 70 chevy. Could my crappy battery connection force current through the fender on its return to the battery?
What kind of battery connections do you all use?
What else would cause this wire to burn up?
I've had this truck for a year with no problems. Could it be that since I haven't driven it much (broken rear diff), the battery has drained and needs replacing?

Thank you for your help!